Friedman Butterslax Bill Kelliher Signature 100-watt 3-channel Tube Head with EL34s

100-watt 3-channel All-tube Guitar Amplifier Head with Line-out, Effects Loop, and 2-button Footswitch
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Friedman Butterslax Bill Kelliher Signature 100-watt 3-channel Tube Head with EL34s image 1
Friedman Butterslax Bill Kelliher Signature 100-watt 3-channel Tube Head with EL34s image 1
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Friedman Butterslax Bill Kelliher Signature 100-watt 3-channel Tube Head with EL34s
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Bill Kelliher of Mastodon's Signature Amp

The Friedman Butterslax is the signature tube amplifier head of Mastodon's lead guitarist, Bill Kelliher. The Butterslax unleashes a wide range of savage yet extremely articulate distorted tones from its three selectable channels. Even the "clean" channel is better suited to rock-style crunch than crystal-clean timbres. And you'll find just enough features, such as Friedman's transparent effects loop, a variable line-out, and an included 2-button footswitch, to attain full sonic control of your tone. Take the Butterslax for a test drive, but hold on tight.

Friedman Butterslax Bill Kelliher Signature Amplifier Head at a Glance:
  • A straightforward, fire-breathing rock amp
  • Unbelievably clear distorted tones
  • Friedman's famous effects loop and other additions
A straightforward, fire-breathing rock amp

At first glance, the 100-watt Friedman Butterslax Bill Kelliher signature amplifier head may look like a well-behaved classic rock amp. While those iconic tones are on tap, plugging into the Butterslax immediately throws you into a world of high-gain rock tones that are to die for. Dialing in the amp's voice couldn't be easier with its simple-to-understand control layout. Two independent tone stacks control the "clean" channel and the two overdrive channels respectively.

Unbelievably clear distorted tones

Bill Kelliher demands a high level of articulation when he's pummeling stages around the world with his band Mastodon. Therefore, from the cleanest tones to diming the gain on the third channel, you won't believe how clear and articulate the sound remains. The clean channel is engineered to offer a good amount of breakup, while being very touch sensitive for cleaner passages. The second channel is based on Friedman's popular BE gain circuit. And the third channel, as Kelliher puts it, "is the disintegration channel."

Friedman's famous effects loop and other additions

One thing that keeps Friedman amps at the top of Sweetwater guitarists' list is their powerful and transparent effects loops. That effects loop is on full display around back of the Butterslax. You'll also find an input for the included 2-button footswitch, a 3-position impedance selector switch for matching the amplifier's output to your favorite speaker cabinet, and a line output with its own volume control. The Butterslax boasts all the features a hard-rock guitarist demands with nothing to get in the way.

Friedman Butterslax Bill Kelliher Signature Amplifier Head Features:
  • Signature amp head of Mastodon lead guitarist Bill Kelliher
  • 3 channels deliver all the gain you could desire
  • Vintage styling
  • Friedman effects loop is very transparent sounding
  • 100 watts of all-tube power
  • 3-position impedance switch matches to any guitar cabinet
  • 2-button footswitch included
The Butterslax is designed for the sonic devastation of Mastodon.

Additional Media

Guitar Amp Buying Guide

Tech Specs

Type Tube, Hand-wired
Number of Channels 3
Total Power 100W
EQ Dual 3-band EQ
Preamp Tubes 4 x 12AX7
Power Tubes 4 x EL-34
Inputs 1 x 1/4"
Outputs 2 x 1/4" (4/8/16 ohm out), 1 x 1/4" (line out)
Effects Loop Yes
Footswitch I/O 1 x 1/4" (2-button footswitch included)
Height 11"
Width 27.25"
Depth 9"
Weight 42 lbs
Manufacturer Part Number Butterslax

Customer Reviews

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I have a Runt 20, BE 100, and the Butterslax. After all these years somebody finally figured how to get the tone we all chase into a line of amps. The Butterslax is a high gain amp...but all tones are available. Channel one goes nice clean to Plexi like tones. Channel 2 is hot rodded and channel 3 low end is tight low end..with ground shaking palm muted chunking. No O.D. pedals needed. Some delay and reverb sounds good with them. Amazing amps!! I have gone through so many amps and so much money over the past 27 years. I am selling all my other gear. Absolutely the best sounding amps I have ever heard. Dave Friedman is the man. Buy one and you will not be dissapointed. Youtube clips are very accurate as to what each amp sounds like. No reason to discuss features, just listen to the clips.
See also: Amp Heads, Friedman, Friedman Guitar Amp Heads